﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.UI.ApplicationSettings;
using Windows.UI.Popups;
using eLuk.Common;
using eLuk.Data;
using eLuk.Entity;
using eLuk.Runtime;

// The Split App template is documented at http://go.microsoft.com/fwlink/?LinkId=234228

namespace eLuk
{
	/// <summary>
	/// Provides application-specific behavior to supplement the default Application class.
	/// </summary>
	sealed partial class App : Application
	{

		/// <summary>
		/// Initializes the singleton Application object.  This is the first line of authored code
		/// executed, and as such is the logical equivalent of main() or WinMain().
		/// </summary>
		public App()
		{
			this.InitializeComponent();
			this.Suspending += OnSuspending;
		}

		/// <summary>
		/// Invoked when the application is launched normally by the end user.  Other entry points
		/// will be used such as when the application is launched to open a specific file.
		/// </summary>
		/// <param name="e">Details about the launch request and process.</param>
		protected override async void OnLaunched( LaunchActivatedEventArgs e )
		{

#if DEBUG
			if ( System.Diagnostics.Debugger.IsAttached )
			{
				this.DebugSettings.EnableFrameRateCounter = true;
			}
#endif

			//await App.InitEmailEngine();
			//EmailAccount emailAccount = App.eLukComponent.SubComponents.Find( g => g.UniqueId == "email" ).eLukObject as EmailAccount;
			//eLukFolder root = emailAccount.IMAPFolder;
			//App.LaunchEvent = e;
			//this.LoadUI( true, root, e );
			Frame rootFrame = Window.Current.Content as Frame;

			// Do not repeat app initialization when the Window already has content,
			// just ensure that the window is active

			if ( rootFrame == null )
			{
				// Create a Frame to act as the navigation context and navigate to the first page
				rootFrame = new Frame();
				//Associate the frame with a SuspensionManager key                                
				SuspensionManager.RegisterFrame( rootFrame, "AppFrame" );
				// Set the default language
				rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[ 0 ];

				rootFrame.NavigationFailed += OnNavigationFailed;

				if ( e.PreviousExecutionState == ApplicationExecutionState.Terminated )
				{
					// Restore the saved session state only when appropriate
					try
					{
						await SuspensionManager.RestoreAsync();
					}
					catch ( SuspensionManagerException )
					{
						//Something went wrong restoring state.
						//Assume there is no state and continue
					}
				}

				// Place the frame in the current Window
				Window.Current.Content = rootFrame;
			}
			if ( rootFrame.Content == null )
			{
				// When the navigation stack isn't restored navigate to the first page,
				// configuring the new page by passing required information as a navigation
				// parameter
				rootFrame.Navigate( typeof( eLuk.eLukEmailView ), e.Arguments );
				//rootFrame.Navigate( typeof( eLuk.eLukMainView ), e.Arguments );
				//rootFrame.Navigate( typeof( eLuk.GroupView ), e.Arguments );
			}
			// Ensure the current window is active

			Window.Current.Activate();

		}

		/// <summary>
		/// Invoked when Navigation to a certain page fails
		/// </summary>
		/// <param name="sender">The Frame which failed navigation</param>
		/// <param name="e">Details about the navigation failure</param>
		private void OnNavigationFailed( object sender, NavigationFailedEventArgs e )
		{
			throw new Exception( "Failed to load Page " + e.SourcePageType.FullName );
		}

		/// <summary>
		/// Invoked when application execution is being suspended.  Application state is saved
		/// without knowing whether the application will be terminated or resumed with the contents
		/// of memory still intact.
		/// </summary>
		/// <param name="sender">The source of the suspend request.</param>
		/// <param name="e">Details about the suspend request.</param>
		private async void OnSuspending( object sender, SuspendingEventArgs e )
		{
			var deferral = e.SuspendingOperation.GetDeferral();
			await SuspensionManager.SaveAsync();
			deferral.Complete();
		}

	}
}
